import 'package:english_words/english_words.dart';
import 'package:flutter/material.dart';

class RandomWords extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => new RandomWordsState();
}

class RandomWordsState extends State<RandomWords> {
  final _suggestions = <WordPair>[];
  final _biggerFont = const TextStyle(fontSize: 18.0);
  final _saved = new Set<WordPair>();

  @override
  Widget build(BuildContext context) {
    // final wordPair = new WordPair.random();
    // return new Text(wordPair.asPascalCase);
    return new Scaffold(
        appBar: new AppBar(
            title: new Text('Startup Name Generator'),
            actions: <Widget>[
              new IconButton(icon: new Icon(Icons.list), onPressed: _pushSaved),
            ]),
        body: _buildSuggestions());
  }

  Widget _buildSuggestions() {
    return new ListView.builder(
        padding: const EdgeInsets.all(16.0),
        itemBuilder: (context, i) {
          if (i.isOdd) {
            return new Divider();
          }
          final index = i ~/ 2;
          if (index >= _suggestions.length) {
            _suggestions.addAll(generateWordPairs().take(10));
          }
          return _buildRow(_suggestions[index]);
        });
  }

  Widget _buildRow(WordPair pair) {
    // return new ListTile(title: new Text(pair.asPascalCase, style: _biggerFont));
    final alreadySaved = _saved.contains(pair);
    return new ListTile(
        title: new Text(pair.asPascalCase, style: _biggerFont),
        trailing: new Icon(
            alreadySaved ? Icons.favorite : Icons.favorite_border,
            color: alreadySaved ? Colors.red : null),
        onTap: () {
          setState(() {
            if (alreadySaved) {
              _saved.remove(pair);
            } else {
              _saved.add(pair);
            }
          });
        });
  }

  void _pushSaved() {
    Navigator.of(context).push(new MaterialPageRoute(builder: (context) {
      final tiles = _saved.map((pair) {
        return new ListTile(
            title: new Text(
          pair.asPascalCase,
          style: _biggerFont,
        ));
      });
      final divided =
          ListTile.divideTiles(context: context, tiles: tiles).toList();
      return new Scaffold(
          appBar: new AppBar(title: new Text('Saved Suggestions')),
          body: new ListView(children: divided));
    }));
  }
}
